20433828 has 12 divisors (see below), whose sum is σ = 47678960. Its totient is φ = 6811272.

The previous prime is 20433823. The next prime is 20433851. The reversal of 20433828 is 82833402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20433795 and 20433804.

It is not an unprimeable number, because it can be changed into a prime (20433823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851398 + ... + 851421.

Almost surely, 2^20433828 is an apocalyptic number.

It is an amenable number.

20433828 is an abundant number, since it is smaller than the sum of its proper divisors (27245132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20433828 is a wasteful number, since it uses less digits than its factorization.

20433828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702826 (or 1702824 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20433828 is about 4520.3791876346. The cubic root of 20433828 is about 273.3903899661.

The spelling of 20433828 in words is "twenty million, four hundred thirty-three thousand, eight hundred twenty-eight".